Lock for sliding doors.



H. G. VOIGHT. LOCK FOR SLIDING DOORS.

Patented 0ct.15, 1 912.

QSHEETHHBET 1.

Wilt/(E8859 INVENTOR EQW/GHT I a 20:71:11 I Q,

ATTORNEYS APPLICATION FILED MABHZ, 1912.

H. G. VOIGHT.

LOOK FOR SLIDING DOORS.

APPLIOATION FILED MAR.2, 1912.

. 1,041,704.- Patented 0qt.15,1912.

2 SHEETS-SHEET 2.

WIT "8858 INVENTOR MTORHEYS COLUMBIA PLANOGRAPH C0.,WI-SHINOTON, D. c.

win STATES HENRY G. VOIGI-IT, OF NEW BRITAIN, CONNECTICUT.

LOCK FOR SLIDING DOORS.

Specification of Letters Patent.

Patented Oct. 15,1912.

. Application filed March 2, 1912. Serial No. 681,253.

To aZZ whom it may concern:

Be it known that I, HENRY G.

VoIeHT, a citizen of the United States, residing at New Britain,Hartford county, State. .of.

Connecticut, have invented certain new and useful Improvements in Looksfor Sliding Doors, of which the following is a full, clear, and exactdescription.

This invention relates to looks for sliding elevator doors and the likeof the type employing closing lever connections, and is designed toafford means which will automatically lock the said lever connectionsagalnst opening movement when the door is closed, but which may bemanipulated by an operator to release the locking means and to of feetthe opening of the door.

A. preferable embodiment of the invention is illustrated in theaccompanying drawings in which,

Figure l is a view in side elevation showing the invention applied tothe door of an elevator well. Fig. 2 is a horizontal sectional viewthrough the well casing showing the parts in top plan. Fig. 3 is a viewin elevation showing the locking means engaging with and locking thetoggle lever connection against opening movement. Fig. 4 is a view inside elevation showing such means in unlocked position and the parts inthe position assumed when the door is open. Fig. 5 is a vertical sectionon the line M, Fig. 3. Fig. 6 is a vertical section through the leverguide, taken on the line 6-6, Fig. 1. Fig. 7 is a horizontal section onthe line 5-5, F i 3.

I have illustrated my locking device as applied to door closingmechanism of the general type illustrated in my pending application,Serial No. 673,287 and embodying a closer cylinder suitably mounted uponthe well casing, and a pair of levers forming a toggle, one end of whichis pivotally mounted upon the door casing and is connected with thepiston of the closer cylinder, and the other end of which is secured to-the forward edge of the door. The closer cylinder contains meansnormally actuating said toggle to close the door.

Referring to the drawings by numerals: 1 indicates the casing of anelevator well forming a stationary abutment independent of the door; 2 asliding door in said casing and 3 a bracket mounted upon the well casingat a point distant from the door and having pivotally mounted at itslower end a door closer cylinder 4.

5 indicates a lever member having one end pivoted to the upper portionof the bracket 3, and having riveted to each face thereof reinforcingstrips 5 spaced from the ends of the lever. The free end of the lever 5is embraced between the ends of spaced bars (3 forming a second levermember 6 and is pivotally secured thereto. The other end of the lever 6is pivotally mounted upon the forward edge of the door in a manner to behereinafter described, and these two levers together form a toggle. Thelever 5, at a point adjacent its outer or rear end, is provided with atransverse arm 7 which is connected to the inder 4E. The parts so fardescribed are of the general type of door actuating device illustratedin my pending application hereinbefore referred to.

In order to retain the levers of the toggle closely adjacent the doorand well casing and to prevent them from sagging, I prefer to employguiding means, in the present instance embodied in the form of spacedguide strips 9 mounted upon therear edge of the door 2 and inclosingbetween them the spaced bars 6 of the lever member 6.

Mounted at the inner or forward ends of the bars 6 comprising'the levermember 6, and having its outer or rear edge inclosed therebetween, is asegmental plate 10. At their inner or forward extremities, the bars 6and the plate 10 therebetween are pivotally mounted upon a door plate 11by means of a headed pin or bolt 12 which extends from a countersunkrecess in the outer strip 6 through apertures formed in the plate 10,inner bar 6 and through the plate 11, and which is held to said plate bya nut 13 en gaging with its threaded end and fitting in the countersunkrecess in the rear face of said plate. The lever member 6 and thesegmental plate 10 will, therefore, turn on this stud 12 as a pivot, therear edge 10 of the segmental plate being formed as the arc of a circlewith said stud as the center.

Secured to the forward edge of the door at a point above the plate 11 ina second and upper door plate 14: provided with a hub portion 15 havinga concentric annular recess 15* surrounding a central stud 15 whichextends out beyond said hub and has its outer end reduced and threaded.Within piston rod 8 of the closer cylthe annular recess 15 is mounted acoil end l8 formed as an arc with the hub 15as' the center for said are.At its end this extension 18 is provided with cheek plates 19 secured toeither face thereof and extending beyond its arcuate edge and below itsinner or forward edge, as shown. The arcuate edge 10 of the segmentalplate 10 moves, therefore, in a circle with the stud 12 as the center,and the curved end of the extension arm 18 moves in an intersecting arcwith the stud 15 as its center. The plate 10 has its edge at 1O cut awayto form a curve corresponding to the curve of the end of the extension18, and with the segmental plate and toggle lever, cooperates with thelocking lever in the following manner: The pivot points of the arm 18and of the lever 6 and its plate 10 are so positioned, and said plateand arm so constructed, that when the door has been closed, the end ofthe extension 18 will just clear the extremity of the arcuate edge 10and will be'moved by its spring into the curved recess 10 of thesegmental plate to lock the plate against upward or door-openingmovement the plate therefore acting as a locking abutment. The parts areso designed that if in this position the locking lever 17 is moved onits pivot independently of the plate 10 and lever member 6, its curvedend 18, being of the same curvature as that of the recess 10 and havinga limited movement independent of the segmental plate, will swing out ofsaid recess and permit the toggle to be broken and the levers to bemoved to door-opening position.

Workmen, in assembling a device of this character, frequently makeslight errors in measurements, and in order to enable the segmentalplate 10 to be correctly adjusted relative to the end of the arm 18 ofthe locking lever 17, I secure this plate 10 between the lever members 6adjustably in the following manner: This plate, adjacent its rear orcurved edge 10*, is provided with a curved slot 23 curved on an arc,with the bolt 12 as the center. A bolt 24 is inserted from'the rear ofthe back lever bar 6 and extends through this slot and through the frontlever bar, and is clamped thereagainst by means of a nut 25 so that whenit is desired to move the plate 10 relative to the lever member 6, it isonly necessary to loosen the nut 25, move the plate to its desiredposition, and then, by screwing down on the nut 25, the plate issecurely held in this adjusted position. Y 1

In order to operate the locking lever to unlock and open the door, Iprefer to extend its body portion 17 downwardly to form at its lower endan offset handle portion 17% Adjacent its forward end, the outer bar 6of the lever member 6 is provided with a guide plate 20 spaced from saidbar and guiding between it and said bar the actuating lever 17 thehandle thereof extending below said guide bar as shown. This bar 6 andguide 20, at their forward ends, are extended beyond the pivot point 12of the lever member and are preferably riveted together.

outermost bar 6 by the same nut 25 which serves to clamp the segmentalplate 10 in adjusted position. I have heretofore stated that the coilspring 16 normally tends to throw the lever into locking engagement withthe end 10 of the segmental plate 10, when the door is closed. I preferto employ a stop for the movement of the lever 17 which will prevent itswinging beyond pl atelocking position, and to this end, insert betweenthe guide 20 and its bar 6 and at the forward end thereof, a bufferstop21 preferably in the form of a pin having an outer sleeve of rubber.

From the foregoing description it will be seen that when the door isclosed by the action of the closer cylinder 4., the segmental plate 10swings downwardly until the end of the extension 18 of the locking leverclears the curved edge of said plate and drops behind said plate, itscurved end 18 engaging in the curved recess 10 and the handle 17abutting against the bufferstop 21. In order to move the arm 18 fromlocking engagement with the segmental plate 10, the handle of thelocking lever 17 is moved to the right from the position shown in Fig. 3toward that shown in Fig. t until said lever strikes against a frictionroller 22- mounted between the guide 20 and its strip 6 at the endopposite the buffer-stop 21. Then the lever has moved so far, the end ofits extension 18 will have cleared the curved edge of the segmentalplate 10, its cheek plates 19 inclosing be tween them the curved edge ofthe plate 10. Further movement of the lever 17 will exert pressureagainst the friction roller 22, forming a relatively stationaryabutment, and break the toggle and move the door to opened position, thecurved edge of the plate 10 moving upwardly during this operation andbeing guided between the inclosing cheek plates 19 of the locking lever.\Vhen the door is to be closed, the handle of the locking lever isreleased and the closer cylinder will move the toggle members to closethe door. During this movement the segmental plate 10, with the levermember 6, will move downwardly from the position shown in Fig. at tothat shown in Fig. 3,

The guide 20 at its rear end is held to the the curved edge of the plate10 being guided between the cheek plates 19 ot' the locking member, andits curved end 18 riding over the end of the plate 10 as the doorcloses, and dropping into locking engagement with the curved face orrecess 1.0? of said plate, thereby locking the toggle against openingmovement. In this closing movement, the forward extensions of the cheekplates 19, which project beyond the curved end of the extensionlS, willguide this curved end of the plate as it clears the edge of the plateand drops into locking engagement therewith. 7

While I have shown my locking device applied to a specificdoor-operating means, it is susceptible of application to modified formsthereof, and is itself capable of varia tion and modification within thespirit of my invention and of the appended claims.

What I claim, therefore, and desire to secure by Letters Patent is:

1. In device of the character described, the combination ofa doorcasing, a sliding door, a lever pivoted to said door and con nected tosaid casing and swinging with the opening and closing movement of saiddoor, a movable locking device carried by the door, an abutment carriedby and oscillating with the movement of said lever, said abutment beingpositioned by said lever when the door is open to engage and re strainsaid device from looking movement and said abutment being positioned bysaid lever upon the closing of the door to release said locking deviceto permit it to move relative to and beyond said abutment to therebylock said door against-opening movement, and means whereby said look ingdevice may be withdrawn from locking position and whereby said door maybe opened.

2. In a device of the character described, a sliding door, a movable armcarried thereby, a connection for said arm independent of the door, anoperating handle carried by the door, a movable locking devicecontrolled by said handle, and an abutment carried by and moving withsaid arm, said abutment being positioned by said arm when the door'isopen to engage and restrain said locking device from looking movementand said abutment being positioned by said arm upon the closing of thedoor to release said locking device to permit it to move relative to andbeyond said abutment to lock said abutment and its armagainst'door-opening movement.

3. In a device of the character described, a sliding door, a movablelever carried thereby, a connection for said lever independent of thedoor, an operating handle carried by the door, a movable locking devicecontrolled by said handle, an abutment carried by and moving with saidlever, said abutment being positioned by said lever when the door isopen to engage and restrain said locking device from looking movementand said abutment being positioned by said lever upon the closing of thedoor to release said locking device to permit it to move relative to andbeyond said abutment to lock said abutment and its arm against dooropening movement, and closing mechanism for said door operativelyconnected with said lever to move the latter in a direction to move saiddoor to closed position.

4. In a device of the character described, a sliding door, an armpivotally mounted near one end on said door, a support or connectionindependent of the door for the other end of said arm, said arm beingmovable relatively to said door and to said independent support, anoperating handle carried by the door for moving the latter, said handlehaving a limited independent movement relatively to said door, anabutment carried by and moving with said arm, said abutment beingpositioned by said arm when the door is open to engage and restrain saidlocking device from locking movement and said abutment being positionedby said arm upon the closing of the door to release said locking deviceto permit it to move relative to and beyond said abutment to lock saidabutment and its arm against door-opening movement, said locking devicebeing controlled by the said independent movement of said handle.

5. In a device of the character described, a sliding door, a togglelever connected at one end to said door, a cooperating toggle lever forthe other end of the first mentioned toggle lever, a support for saidsecond toggle lever, means for moving said toggle levers normally in adirection to transmit a closing movement to the door, a door operatinghandle carried by the door and capable of limited independent movementrelatively thereto, a movable locking device, an abutment carried by andmoving with said first mentioned toggle lever, said abutment beingpositioned by said lever when the door is open to engage and restrainsaid locking device from looking movement and said abutment beingpositioned by said lever upon the closing of the door to release saidlocking device to permit it to move relative to and beyond said abutmentto lock said abutment and its lever against door opening movement, andmeans of connection between said handle and said locking device wherebythe latter may be moved from looking position preparatory to opening thedoor.

6. In a device of the character described, a sliding door, a leverconnected at one end thereto and having a swinging movement relativethereto with the opening and closing of the door, an independent supportfor the other end of said lever, a part carried by said lever andoscillating with the movement thereof, a locking member mounted on saiddoor and moving in a line intersected by said oscillating part, saidpart being constructed and arranged to restrain said looking member fromlooking movement while the door is open and to be moved beyond the lineof movement of said locking member by the swinging movement of saidlever when said door is closed whereby said locking member may move pastsaid oscillating part and be positioned in the path of door openingmovement thereof to block the same.

7. In a device of the character described, in combination, a stationaryabutment, a sliding door, a lever pivoted to said door and connected tosaid abutment and swinging with the opening and closing of the door, asegment carried by said lever to oscillate with the movement thereof, alocking lever pivotally mounted on said door and having a part swingingin an arc intersected by said oscillating segment, said segment beingconstructed and arranged to be swung beyond the arc of movement of saidlever part by the swinging movement of said door lever when said door isclosed, means automatically positioning said lever part beyond saidsegment and in the path of door-opening movement thereof when said doorcloses, and means whereby said locking lever may be actuated to movesaid lever part from such position and to open said door.

8. In a device of the character described, in combination, a stationaryabutment, a sliding door, a lever mounted on said door and connected tosaid abutment and swing ing with the opening and closing of the door, apart carried by said lever oscillating with the movement thereof, alocking member mounted on said door and moving in a line intersected bysaid oscillating part, said oscillating part being constructed andarranged to be moved beyond the line of movement of said locking memberby the swinging movement of said lever when said door is closed, meanswhereby, when said door closes, said locking member may be moved pastsaid oscillating part and positioned in the path of door-openingmovement thereof, and means adapted upon a preliminary actuation to movesaid locking member from said locking position, and

adapted upon further actuation. to open said door.

9. In a device of the character described, in combination, a stationaryabutment, a sliding door, a lever pivoted to said door and connected tosaid abutment and swinging with the opening and closing of the door, asegment carried by said lever to oscillate with the movement thereof,means for adjusting said segment relative to said door lever and saidlocking part, a locking lever pivotally mounted on said door and havinga part swinging in an arc intersected by said oscillating segment, saidsegment being constructed and arranged to be swung beyond the arc ofmovement of said lever part by the swinging movement of said door leverwhen said door is closed, means automatically positioning said leverpart beyond said segment and in the path of door-opening movementthereof when said door closes, and means whereby said locking lever maybe actuated to move said lever part from such position and to open saiddoor.

10. In a device of the character described, in combination, a stationaryabutment, a sliding door, a lever pivoted to said door and connected tosaid abutment and swinging with the opening and closing of the door, asegment carried by said lever and oscillating with the movement thereof,a locking lever pivoted to said door and provided'with an arm adapted toswing in an arc intersected by the arc of movement of said segment, saidarm being adapted to engage the edge of said segment and said segmentbeing constructed and arranged to be swung beyond the arc of movement ofsaid arm by the swinging movement of said lever when said door is closedwhereby said arm may be moved past said segment and be positionedthereagainst in the path of dooropening movement thereof to thereby locksaid door, and means whereby said arm may be moved from such lockingposition and whereby said door may be opened.

11. In a device of the character described, in combination, a stationaryabutment, a

sliding door, a lever pivoted to said door and connected to saidabutment and swing ing with the opening and closing. of the door, asegment pivotally mounted upon said door and adjustably secured to saidlever at its free end and oscillating with the movement of said lever, alocking lever pivoted to said door and provided with an arm adapted toswing in an arc intersected by the arc of movement of said segment, saidarm being adapted to be engaged and restrained by the arcuate edge ofsaid segment and said segment being constructed and arranged to be movedbeyond the arc of movement of said arm by the movement of said doorlever, when said door is closed, means swinging said arm beyond saidsegment when it is so moved and positioning it thereagainst in the pathof door-opening movement thereof to lock said door, and means wherebysaid locking lever may be actuated to move said arm from lockingposition and may actuate said door lever to open said door.

12. In a device of the character described, in combination, a doorcasing, a sliding door, a lever pivoted to said door and connected tosaid casing and swinging with the opening and closing of said door, asegment pivotally mounted on said door concentrically with said leverand secured thereto at its lower edge and oscillating with the movementof said lever, a lockinglever pivoted to said door and provided with anarm swinging in an arc intersected by the arc of movement of the edge ofsaid segmentand adapted to be engaged and restrained by said edge, meanswhereby the movement of said door lever, when said door closes,oscillates said segment to bring its edge beyond the arc of movement ofsaid arm, means antomatically swinging said arm beyond said segment whenit is so moved and positioning said arm thereagainst in the path ofdooropening movement of said segment to lock said door, and meanswhereby said arm may be moved from such position and whereby sflaid doorlever may be actuated to open said oor.

13. In a device of the character described, in combination, a doorcasing, a sliding door, a lever pivoted to said door and connected tosaid casing and swinging with the opening and closing of said door, asegment pivotally mounted on said door concentrically with said leverand secured thereto at its lower edge and oscillating with the move mentof said lever, a locking lever pivoted to said door and provided with anarm swinging in an arc intersected by the arc of movement of the edge ofsaid segment and adapted to be engaged and restrained by said edge,means -for angularly adjusting said segment relative to its lever and tosaid arm, means whereby the movement of said door lever, when said doorcloses, oscillates said segment to bring its edge beyond the arc ofmovement of said arm, means automatically swinging said arm beyond saidsegment when it is so moved and positioning said arm thereagainst in thepath of door-opening movement of said segment to lock said door, andmeans whereby said arm may be moved from such position and whereby saiddoor lever may be actuated to open said door.

14. In a device of the character described, in combination, a doorcasing, a sliding door, a lever pivoted to said door and connected tosaid casing and swinging with the opening and closing of said door, asegment pivotally mounted on said door concentrically with said leverand secured thereto at its lower edge and oscillating with the movementof said lever, a locking lever pivoted to said door and provided with anarm swinging in an arc intersected by the arc of movement of the edge ofsaid segment and adapted to be engaged and restrained by said edge,means whereby the movement of said door lever, when said door closes,oscillates said segment to bring its edge beyond the arc of movement ofsaid arm, means automatically swinging said arm beyond said segment whenit is so moved and positioning said arm thereagainst in the path ofdoor-opening movement of said segment to lock said door, a stop forlimiting the locking movement of said lever, means for actuating saidlocking lever to move said arm from looking position, and an abutmentengaged by a further actuating movement of said lever and adapted tomove said door lever to open said door.

HENRY Gr. VOIGHT.

Witnesses GWENDOLINE A. JACKSON, M. S. WIARD.

Copies of this patent may be obtained for five cents each, by addressingthe Commissioner of Patents.

' Washington, D. G.

Corrections in Letters Patent No. 041,704".

1t isshereby certified that in Letters-Patent No. 1,'O.&1, 704,grantedjQctober 15,; 1912, upon the application of Henry G. Voightrof-New Britain,- Connecticut, for an improvementin. Locksfor'SlidingDoors, errors appear in the printed specification requiring correctionars followsz Page fa, lines 1, 26, and 535-:t, strike out the wordconcentrically; samepage, lines 2-3, 2728, and 5%55, for the Words atits lower edge read and extending therefrom; and that the said LettersPatent should be read with these corrections therein that the same mayconform to the record of the case in the Patent Ofiice.

Signed and sealed this 29th day of October, A. D., 1912.

[SEAL] C. C. BILLINGS;

Acting Commissioner of Patents.

